Patents by Inventor Yasukazu KUWAYAMA

Yasukazu KUWAYAMA has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20220334299
    Abstract: The present invention provides a polarizing element which has an excellent antireflection function as being applied to an image display device; and a circularly polarizing plate and an image display device, each of which has a polarizing element. The polarizing element has an alignment film and an anisotropic light-absorbing film formed using a dichroic substance, in which a degree S of alignment of the anisotropic light-absorbing film is 0.92 or more, an average refractive index nave at a wavelength of 400 to 700 nm of the alignment film is 1.55 or more and less than 1.78, an in-plane refractive index anisotropy ?n at a wavelength of 550 nm of the alignment film is less than 0.10.
    Type: Application
    Filed: June 29, 2022
    Publication date: October 20, 2022
    Applicant: FUJIFILM Corporation
    Inventors: Yasukazu KUWAYAMA, Fumitake MITOBE, Yuzo FUJIKI, Jun TAKEDA
  • Publication number: 20220283351
    Abstract: An object of the present invention is to provide a laminate including a light absorption anisotropic layer, in which a decrease in a degree of polarization is suppressed even in a case where the laminate is simultaneously stretched in a plurality of directions, and an optical device and a display device, each using the laminate. The laminate of an embodiment of the present invention is a laminate having at least a resin substrate and a light absorption anisotropic layer, in which a tan ? peak temperature of the resin substrate is 170° C. or lower, the light absorption anisotropic layer includes a liquid crystalline compound and a dichroic substance, and an alignment degree of the dichroic substance is 0.95 or more.
    Type: Application
    Filed: May 24, 2022
    Publication date: September 8, 2022
    Applicant: FUJIFILM Corporation
    Inventors: Naoya SHIBATA, Yasukazu KUWAYAMA, Naoki KOITO, Yumi KATO, Fumitake MITOBE, Naoyoshi YAMADA
  • Patent number: 11415733
    Abstract: An object of the present invention is to provide a polarizing element which has an excellent antireflection function as being applied to an image display device; and a circularly polarizing plate and an image display device, each of which has the polarizing element. The polarizing element of an embodiment of the present invention has an alignment film and an anisotropic light-absorbing film formed using a dichroic substance, in which a degree S of alignment of the anisotropic light-absorbing film is 0.92 or more, and an average refractive index nave at a wavelength of 400 to 700 nm of the alignment film is 1.55 to 2.0.
    Type: Grant
    Filed: September 30, 2019
    Date of Patent: August 16, 2022
    Assignee: FUJIFILM Corporation
    Inventors: Yasukazu Kuwayama, Fumitake Mitobe, Yuzo Fujiki, Jun Takeda
  • Publication number: 20220204856
    Abstract: Provided is a polarizer with excellent durability and an image display device including the polarizer. The polarizer includes a composition for forming a polarizer which contains a polymer liquid crystal compound and a dichroic material, in which the dichroic material includes a first dichroic material and a second dichroic material, an absolute value of a difference between a log P value of the first dichroic material and a log P value of the second dichroic material is 1.0 or less, and a stabilization energy indicating an energy loss in a case where one dichroic material of the first dichroic material and the second dichroic material is incorporated into a structure singly formed of the other dichroic material that is aligned therein is 30 kcal/mol or less.
    Type: Application
    Filed: March 18, 2022
    Publication date: June 30, 2022
    Applicant: FUJIFILM Corporation
    Inventors: Yumi KATO, Yasukazu KUWAYAMA, Yoshiaki TAKADA
  • Publication number: 20220206202
    Abstract: Provided is a polarizing element which has an excellent antireflection function as being applied to an image display device; and a circularly polarizing plate and an image display device, each of which has the polarizing element. The polarizing element has an alignment film and an anisotropic light-absorbing film formed using a dichroic substance, in which a degree S of alignment of the anisotropic light-absorbing film is 0.92 or more, and an average refractive index nave at a wavelength of 400 to 700 nm of the alignment film is 1.55 to 2.0.
    Type: Application
    Filed: March 17, 2022
    Publication date: June 30, 2022
    Applicant: FUJIFILM Corporation
    Inventors: Yasukazu KUWAYAMA, Fumitake MITOBE, Yuzo FUJIKI, Jun TAKEDA
  • Patent number: 11173694
    Abstract: An object of the present invention is to provide a laminate in which an excellent alignment property of a dichroic substance is maintained and which is excellent in both high-temperature durability and moisture-heat resistance, a manufacturing method of the laminate, and an image display device using the laminate. A laminate according to an embodiment of the present invention is a laminate having a transparent support, a light absorption anisotropic film, and a transparent resin layer in this order, in which the light absorption anisotropic film is a film containing a dichroic substance represented by a predetermined formula, and the transparent resin layer is a layer containing a polymer which has a hydrophilic group and does not have a glass transition temperature in a temperature range of 95° C. or lower.
    Type: Grant
    Filed: December 19, 2019
    Date of Patent: November 16, 2021
    Assignee: FUJIFILM Corporation
    Inventors: Yuzo Fujiki, Yasukazu Kuwayama, Jun Takeda
  • Patent number: 11148404
    Abstract: An object of the present invention is to provide a laminate in which an excellent alignment property of a dichroic substance is maintained and which is excellent in both high-temperature durability and moisture-heat resistance, a manufacturing method of the laminate, and an image display device using the laminate. A laminate according to an embodiment of the present invention is a laminate having a transparent support, a light absorption anisotropic film, and a transparent resin layer in this order, in which the light absorption anisotropic film is a film containing a dichroic substance represented by a predetermined formula, and the transparent resin layer is a layer containing a polymer which has a hydrophilic group and does not have a glass transition temperature in a temperature range of 95° C. or lower.
    Type: Grant
    Filed: December 19, 2019
    Date of Patent: October 19, 2021
    Assignee: FUJIFILM Corporation
    Inventors: Yuzo Fujiki, Yasukazu Kuwayama, Jun Takeda
  • Patent number: 11054691
    Abstract: The present invention provides a polarizing plate including a polarizer having a high transmittance, which can be suitably applied to a circularly polarizing plate with which a significant decrease in an antireflection ability is suppressed in a case where the circularly polarizing plate is disposed on a display element; a circularly polarizing plate; and a display device. The polarizing plate includes a polarizer and an adjacent layer in contact with the polarizer, in which a transmittance in the absorption axis direction of the polarizer is 4.0% or more, and an in-plane average refractive index of the adjacent layer satisfies a relationship of Formula (X), Formula (X): Refractive index in a transmission axis direction of the polarizer<In-plane average refractive index of the adjacent layer<Refractive index in the absorption axis direction of the polarizer.
    Type: Grant
    Filed: July 28, 2020
    Date of Patent: July 6, 2021
    Assignee: FUJIFILM Corporation
    Inventors: Fumitake Mitobe, Jun Takeda, Naoya Nishimura, Yuzo Fujiki, Yumi Katou, Yasukazu Kuwayama
  • Publication number: 20210026195
    Abstract: An object of the present invention is to provide a polarizing element which has an excellent antireflection function in a case of being applied to an image display device; and a circularly polarizing plate and an image display device, each of which has the polarizing element. The polarizing element of an embodiment of the present invention is a polarizing element having an alignment film and an anisotropic light-absorbing film formed using a dichroic substance, in which the alignment film is a photoalignment film formed using a composition for forming a photoalignment film, including a photoactive compound having a polymerizable group and a photoreactive group, a degree S of alignment of the anisotropic light-absorbing film is 0.92 or more, and an average refractive index nave at a wavelength of 400 to 700 nm of the alignment film is 1.55 to 2.0.
    Type: Application
    Filed: October 15, 2020
    Publication date: January 28, 2021
    Applicant: FUJIFILM Corporation
    Inventors: Yasukazu KUWAYAMA, Jun TAKEDA, Naoki KOITO
  • Publication number: 20200355960
    Abstract: The present invention provides a polarizing plate including a polarizer having a high transmittance, which can be suitably applied to a circularly polarizing plate with which a significant decrease in an antireflection ability is suppressed in a case where the circularly polarizing plate is disposed on a display element; a circularly polarizing plate; and a display device. The polarizing plate includes a polarizer and an adjacent layer in contact with the polarizer, in which a transmittance in the absorption axis direction of the polarizer is 4.0% or more, and an in-plane average refractive index of the adjacent layer satisfies a relationship of Formula (X), Formula (X): Refractive index in a transmission axis direction of the polarizer<In-plane average refractive index of the adjacent layer<Refractive index in the absorption axis direction of the polarizer.
    Type: Application
    Filed: July 28, 2020
    Publication date: November 12, 2020
    Applicant: FUJIFILM Corporation
    Inventors: Fumitake MITOBE, Jun TAKEDA, Naoya NISHIMURA, Yuzo FUJIKI, Yumi KATOU, Yasukazu KUWAYAMA
  • Patent number: 10816848
    Abstract: A method for manufacturing a polarizing plate having excellent appearance properties and including a polarizer, an optical rotatory layer, and a brightness enhancement film, a polarizing plate, and a liquid crystal display device including the polarizing plate, are described. The method includes forming an optical rotatory layer, which has a film thickness of 1 to 10 ?m and rotates a polarization axis of linearly polarized light, on a temporary support to manufacture a temporary support with an optical rotatory layer; bonding the optical rotatory layer of the temporary support with an optical rotatory layer and polarizer through a curable adhesive layer, and curing the curable adhesive layer to form a first bonding layer having a storage elastic modulus of 2 to 1500 MPa; peeling off the temporary support from the laminate; and bonding the optical rotatory layer of the laminate and a brightness enhancement film through a second bonding layer.
    Type: Grant
    Filed: October 25, 2018
    Date of Patent: October 27, 2020
    Assignee: FUJIFILM Corporation
    Inventors: Fumitake Mitobe, Jun Takeda, Yasukazu Kuwayama, Yuya Hamaguchi
  • Publication number: 20200139691
    Abstract: An object of the present invention is to provide a laminate in which an excellent alignment property of a dichroic substance is maintained and which is excellent in both high-temperature durability and moisture-heat resistance, a manufacturing method of the laminate, and an image display device using the laminate. A laminate according to an embodiment of the present invention is a laminate having a transparent support, a light absorption anisotropic film, and a transparent resin layer in this order, in which the light absorption anisotropic film is a film containing a dichroic substance represented by a predetermined formula, and the transparent resin layer is a layer containing a polymer which has a hydrophilic group and does not have a glass transition temperature in a temperature range of 95° C. or lower.
    Type: Application
    Filed: December 19, 2019
    Publication date: May 7, 2020
    Applicant: FUJIFILM Corporation
    Inventors: Yuzo FUJIKI, Yasukazu KUWAYAMA, Jun TAKEDA
  • Publication number: 20200033521
    Abstract: An object of the present invention is to provide a polarizing element which has an excellent antireflection function as being applied to an image display device; and a circularly polarizing plate and an image display device, each of which has the polarizing element. The polarizing element of an embodiment of the present invention has an alignment film and an anisotropic light-absorbing film formed using a dichroic substance, in which a degree S of alignment of the anisotropic light-absorbing film is 0.92 or more, and an average refractive index nave at a wavelength of 400 to 700 nm of the alignment film is 1.55 to 2.0.
    Type: Application
    Filed: September 30, 2019
    Publication date: January 30, 2020
    Applicant: FUJIFILM Corporation
    Inventors: Yasukazu KUWAYAMA, Fumitake MITOBE, Yuzo FUJIKI, Jun TAKEDA
  • Patent number: 10338290
    Abstract: A cellulose ester film contains a compound having a structural unit denoted by —NR—(C?O)— in which R represents a hydrogen atom or a substituent, a surface having knoop hardness of greater than or equal to 210 N/mm2 is provided, and loss tangent tan ? at 25° C. is greater than or equal to 0.03.
    Type: Grant
    Filed: August 31, 2016
    Date of Patent: July 2, 2019
    Assignee: FUJIFILM Corporation
    Inventors: Yasukazu Kuwayama, Hiroshi Inada, Aiko Yoshida, Yoshitaka Maeda, Yusuke Ino, Shuuji Kanayama, Nobutaka Fukagawa
  • Publication number: 20190064587
    Abstract: A method for manufacturing a polarizing plate capable having excellent appearance properties and including a polarizer, an optical rotatory layer, and a brightness enhancement film, a polarizing plate, and a liquid crystal display device including the polarizing plate, are described. The method includes forming an optical rotatory layer, which has a film thickness of 10 ?m or less and rotates a polarization axis of linearly polarized light, on a temporary support to manufacture a temporary support with an optical rotatory layer; bonding the optical rotatory layer of the temporary support with an optical rotatory layer and polarizer through a curable adhesive layer, and curing the curable adhesive layer to form a first bonding layer having a storage elastic modulus of 2 to 1500 MPa; peeling off the temporary support from the laminate; and bonding the optical rotatory layer of the laminate and a brightness enhancement film through a second bonding layer.
    Type: Application
    Filed: October 25, 2018
    Publication date: February 28, 2019
    Applicant: FUJIFILM Corporation
    Inventors: Fumitake MITOBE, Jun TAKEDA, Yasukazu KUWAYAMA, Yuya HAMAGUCHI
  • Patent number: 10160846
    Abstract: The inventions are an optical film containing cellulose acylate and a compound having a structure denoted by General Formula (A) described below, and a polarizing plate and a liquid crystal display device employing the optical film. L represents n-valent connecting group, n represents an integer of greater than or equal to 2, and A represents a heterocyclic group denoted by General Formula (I). R1, R3, and R5 represent a hydrogen atom, an alkyl group, a cycloalkyl group, an alkenyl group, an aryl group, or a heteroaryl group. Here, any one of R1, R3, and R5 is bonded to L.
    Type: Grant
    Filed: January 8, 2016
    Date of Patent: December 25, 2018
    Assignee: FUJIFILM Corporation
    Inventors: Masaki Noro, Yutaka Nozoe, Hiroshi Inada, Naoya Shimoju, Aiko Yoshida, Yu Naito, Yasukazu Kuwayama
  • Patent number: 10113040
    Abstract: The polymer film comprises a carbonyl bond-containing polymer and a compound having ?h of equal to or higher than 11.0 and ?? of equal to or lower than 1.50, wherein the ?h is a value of hydrogen-bonding capacity calculated by Hoy method and the ?? is a value calculated by equation 1: ??=|x?13.3|??Equation 1 wherein, in equation 1, ? represents an interatomic distance in the polymer film between atoms most distant from each other among molecules in the compound, excluding a hydrogen atom, calculated by molecular dynamics calculation.
    Type: Grant
    Filed: September 2, 2015
    Date of Patent: October 30, 2018
    Assignee: FUJIFILM CORPORATION
    Inventors: Yasukazu Kuwayama, Nobutaka Fukagawa, Hiroshi Inada, Masaki Noro, Yoshitaka Maeda, Naozumi Shiraiwa, Yu Naito
  • Patent number: 10040754
    Abstract: A cellulose acylate film, which includes a compound denoted by general formula (I) below, the equivalent U of which, calculated as a value obtained by dividing the molecular weight of the compound by the number of divalent linking groups denoted by —O—C(?O)—NH— contained per molecule, is less than or equal to 515, wherein, in general formula (I), each of L11 and L21 independently denotes an optionally substituted alkylene group; each of L12 and L22 independently denotes a single bond, any one of or any combination of —O—, —NR1—, —S— and —C(?O)—; R1 denotes a hydrogen atom or a substituent; each of n1 and n2 independently denotes an integer of 0 to 20, with at least either n1 or n2 being an integer of greater than or equal to 1.
    Type: Grant
    Filed: August 25, 2015
    Date of Patent: August 7, 2018
    Assignee: FUJIFILM Corporation
    Inventors: Hiroshi Inada, Naozumi Shiraiwa, Yingjie Xu, Aiko Yoshida, Masaki Noro, Yasukazu Kuwayama, Nobutaka Fukagawa
  • Patent number: 9850356
    Abstract: An optical film comprising a cellulose acylate film which comprises a compound denoted by formula 2 below: wherein each of R10 and R11 independently denotes a substituent linked to the triazine ring through —NR12— or —CO—; R12 denotes a hydrogen atom or an optionally substituted alkyl group; n denotes 1; and —X1—R1 is selected from the group consisting of partial structures 11 to 14:
    Type: Grant
    Filed: September 2, 2015
    Date of Patent: December 26, 2017
    Assignee: FUJIFILM Corporation
    Inventors: Hiroshi Inada, Naozumi Shiraiwa, Yingjie Xu, Yasukazu Kuwayama, Nobutaka Fukagawa, Masaki Noro
  • Patent number: 9718933
    Abstract: The invention is an optical film at least containing cellulose acylate and a compound having a structure denoted by General Formula (I) described below, and a polarizing plate and a liquid crystal display device employing the optical film. R1 and R3 represent a hydrogen atom, an alkyl group, an alkenyl group, a cycloalkyl group, a cycloalkenyl group, or an aryl group, and R5a and R5b represent an alkyl group, an alkenyl group, a cycloalkyl group, a cycloalkenyl group, an aryl group, or a heterocyclic group. R1, R3, R5a, and R5b may have a substituent group.
    Type: Grant
    Filed: January 5, 2016
    Date of Patent: August 1, 2017
    Assignee: FUJIFILM Corporation
    Inventors: Masaki Noro, Hiroshi Inada, Yoshinori Kanazawa, Aiko Yoshida, Yasukazu Kuwayama